How close have we come to passing the Turing Test?
No one has attempted to make a system that could pass a serious Turing test. All the systems that are claimed to have "passed" Turing tests have done so with low success rates simulating "special" people.  Even relatively sophisticated systems like Siri and learning systems like Cleverbot are trivially stumped.

To pass a real Turing test, you would both have to create a human-level AGI and equip it with the specialized ability to deceive people about itself convincingly (of course, that might come automatically with the human-level AGI).  We don't really know how to create a human-level AGI and available hardware appears to be orders of magnitude short of what is required.  Even if we were to develop the AGI, it wouldn't necessarily be useful to enable/equip/motivate? it to have the deception abilities required for the Turing test.